Fix duplicate TODOCS linting rule reports (#57947)

Author: heiskr

src/content-linter/scripts/lint-content.ts

@@ -575,18 +575,22 @@ function getMarkdownLintConfig(errorsOnly, runRules) {
       for (const searchRule of ruleConfig.rules) {
         const searchRuleSeverity = getRuleSeverity(searchRule, isPrecommit)
         if (errorsOnly && searchRuleSeverity !== 'error') continue
-        searchReplaceRules.push(searchRule)
+        // Add search-replace rules to frontmatter configuration for rules that make sense in frontmatter
+        // This ensures rules like TODOCS detection work in frontmatter
+        // Rules with applyToFrontmatter should ONLY run in the frontmatter pass (which lints the entire file)
+        // to avoid duplicate detections
+        if (searchRule.applyToFrontmatter) {
+          frontmatterSearchReplaceRules.push(searchRule)
+        } else {
+          // Only add to content rules if not a frontmatter-specific rule
+          searchReplaceRules.push(searchRule)
+        }
         if (searchRule['partial-markdown-files']) {
           dataSearchReplaceRules.push(searchRule)
         }
         if (searchRule['yml-files']) {
           ymlSearchReplaceRules.push(searchRule)
         }
-        // Add search-replace rules to frontmatter configuration for rules that make sense in frontmatter
-        // This ensures rules like TODOCS detection work in frontmatter
-        if (searchRule.applyToFrontmatter) {
-          frontmatterSearchReplaceRules.push(searchRule)
-        }
       }
 
       if (searchReplaceRules.length > 0) {